FYI, the retro caps had nothing to do with the Brewers alumni weekend.
All 30 MLB teams were wearing old style caps from their franchise as part of Hall of Fame weekend. So, the Brewers were wearing the style caps they wore in their first year in Milwaukee in .1970.
And, if you can’t see the difference in the colors and style of the Brewers capcompared to the maize and blue and the Michigan block M, thats on you.😀